/*
 * Copyright 2010 - Jeremie Brebec
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.jb.user.server.impl;

import java.util.HashMap;
import java.util.Map;

import org.jb.user.client.LoginException;
import org.jb.user.server.UserRegistry;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.inject.Singleton;

/**
 * 
 * @author jeremie
 *
 */
@Singleton
public class UserRegistryImpl implements UserRegistry {

	private final static Logger logger = LoggerFactory.getLogger(UserRegistryImpl.class);
	
	private final Map< String, String > users = new HashMap< String, String >();

	/*
	 * (non-Javadoc)
	 * @see org.jb.coinche.server.user.UserRegistry#checkLogin(java.lang.String, java.lang.String)
	 */
	@Override
	public synchronized void checkLogin(String name, String password) throws LoginException {
		
		logger.debug("Checking login {}...", name );
		
		if (password == null)
			password = "";
		
		String savedPassword = users.get( name );
		
		if (savedPassword == null) {
			users.put( name, password );
		} else {
			
			if (!savedPassword.equals( password ))
				throw new LoginException();
		}
	}

	/*
	 * (non-Javadoc)
	 * @see org.jb.coinche.server.user.UserRegistry#getUsers()
	 */
	@Override
	synchronized public String[] getUsers() {
		return users.keySet().toArray( new String[0] );
	}

	/*
	 * (non-Javadoc)
	 * @see org.jb.coinche.server.user.UserRegistry#notifyActivity(java.lang.String)
	 */
	@Override
	synchronized public void removeLogin( String user ) {
		users.remove(user);
	}
}
